350 km/h列车风-车激励下高铁站房振动舒适度研究
Study on Vibration Comfort of High-speed Railway Station Building Under Wind-vehicle Excitation of 350 km/h Train
谢伟平 1黄春雷 1花雨萌1
作者信息
- 1. 武汉理工大学土木工程与建筑学院,武汉 430070
- 折叠
摘要
以国内首例正线车速350 km/h通过的高铁车站为研究对象,建立列车-站房CFD模型、列车-高架桥-地基土动力学模型分别计算脉动风压和地面振动荷载,并作为车站有限元模型的输入.通过类比测试验证模型准确性后,分析上盖建筑的振动舒适度.结果表明:350 km/h列车对上方楼板的风压峰值约为750 Pa,动力效应显著;若正线高架桥与站房的基础相隔较近且未采用隔振措施,则正线列车高速通过时由地基土传播的振动对站房结构存在显著影响;高速列车风-车激励导致站房结构舒适度超标.
Abstract
Taking the first high-speed railway station in China passing through with a mainline speed of 350 km/h as the research object,the train-station CFD model and the train-viaduct-foundation soil dynamics model were established to calculate the pulsating wind pressure and ground vibration load respectively,which were used as inputs to the finite ele-ment model of the station.After verifying the accuracy of the models through analogical tests,the vibration comfort of the superstructure was analyzed.The results show that,the peak wind pressure of the 350 km/h train on the floor slab above is about 750 Pa,and the dynamic effect is significant.If the foundation of the mainline viaduct and the station building are close to each other and no vibration isolation measures are adopted,the vibration propagated by the foundation soil during the high-speed passage of the mainline train has a significant effect on the structure of the station building.The wind-vehi-cle excitation of the high-speed train results in the exceeding of the comfort level of the structure of the station building.
关键词
高速铁路/列车脉动风/车桥耦合/车站结构/振动舒适度Key words
high-speed rail/train-induced fluctuating wind/vehicle-bridge coupling/station structure/vibra-tion serviceability引用本文复制引用
基金项目
国家自然科学基金面上项目(52278458)
出版年
2024
NETL
NSTL
万方数据